Dental stool having a rotatable motor control support



July 5, 1955 J. E. COOPER 2,712,348

DENTAL STOOL HAVING A ROTATABLE MOTOR CONTROL SUPPORT Filed March 22,1954 l I III I 26 United States Patent 'Ofi 2,712,348 Patented July 5,1955 ice DENTAL STOOL HAVING A ROTATABLE MOTOR CONTROL SUPPORT John E.Cooper, Los Angeles, Calif. Application March 22, 1954, Serial No.417,709 7 Claims. (Cl. 155-134) This invention relates to a dental stoolhaving a rotatable and retractable motor control support.

It is an object of my invention to provide a dental stool having asupport which is adapted to hold the foot control for the dental motor,which support is adapted to rotate along with the seat of the stool, sothat the actuating arms or levers of the motor control are always in theproper position adjacent the feet of the dentist.

It is a further object of my invention to provide a dental stool havinga foot rest which is available at all times, regardless of the rotationor positioning of the seat providing a foot rest which extends aroundthe entire base of the stool, thus always providing a support for thefeet of the dentist, no matter how the seat is turned. It is a furtherobject of this invention to improve on my earlier construction byproviding a motor control support which is adapted to rotate along withthe seat, so that it is always available at the feet of the dentist.

My invention also comprises such other objects, advantages andcapabilities as will later more fully appear and which are inherentlypossessed by my invention.

While I have shown in the accompanying drawings a preferred embodimentof my invention, it should be understood that the same is susceptible ofmodification and change without departing from the spirit of myinvention.

Referring to the drawings,

Fig. 1 is a side elevational view of my dental stool, with the motorcontrol support shown in dotted lines;

Fig. 2 is a transverse sectional view of the same, taken on line 2 2 ofFig. 1;

Fig 3 is a vertical sectional view of my dental stool, taken on line 3-3of Fig. 2, showing the motor control support in position for use;

Fig. 4 is an enlarged detailed sectional view showing the mounting ofthe shaft which holds the seat;

Fig. 5 is an enlarged detailed sectional view taken on line 55 of Fig.1, showing the fastening means holding the motor control support inretracted position.

feet 11, of foot It is an object of this invention to improve on support10. A fixed center shaft 12 is mounted by screw threading in a mountingbase l3 in the center of foot H 19 to prevent any movement of ablymounted on a ball rotatably positioned on a end of stem 18 is support10.

A two-piece mounting member 14 is positioned surrounding but notcontacting center shaft 12 and is rotatbearing assembly 15, which istrack 15a, which rests on the top of foot support 10. The bottom of ahollow standard 16 is mounted on an annular flange 14a which extendsoutwardly from mounting member 14. This assembly is best shown in Fig. 4of the drawings. Its purpose is to permit standard 16 to be free torotate with respect to foot support 10 without loosening center shaft12.

A saddle shaped seat 17 is screw threadedly mounted on the upper end ofa supporting stem 18. The lower movably mounted within center shaft 12.Stem 18 is provided with a plurality of annular grooves 19 which arespaced apart from each other to permit adjustment of the height of seat17. A sleeve 20 surrounds the upper part of stem 18 within standard 16.A T-shaped height control rod 21 is screw threadedly mounted through theside of most forward position, its end is within one of the grooves stem18 in order to set the height of seat 17.

A motor control support 21 is pivotally attached to a hinge 22, whichextends from the outside of standard 16 in a circular path around thecircumferential edge of foot support 10.

A small rod 26 having a round pin 27 at the end thereof is held out ofthe way, adjacent standard 16 as shown in dotted lines in Figs. 1 and 5of the drawings.

In order to prevent removal of the seat assembly from standard 16, abolt 29 is screw threadedly mounted hollow center portion thereof. Acollar 30 is attached to center shaft 12. When bolt 29 is tightened, itsshaft is positioned beneath collar 30. If seat 17 is lifted upwardly,standard 16 moves upwardly, carrying bolt 29 with it. The shaft of bolt29, tom of collar 30, When bolt 29 is loosened, standard 16 may beremoved from center shaft 12 by upward movement.

In use, the foot control for operation of the dental motor is placed oncircular portion 23 of motor control support 21, with the wiresextending through the opening in the end thereof. The height of seat 17may be easily adjusted to any desired height in the manner set forthabove.

My dental stool may be placed in adjacent the chair. When the a newposition, he can move any desired position dentist desires to move tothe entire dental stool on its casters, carrying with him to the newposition foot support and motor control support 21. provided with apommel 17a, which extends between the thighs of the dentist when he isseated on seat 17. When the dentist desires to turn to a new position,he need only move his thighs, contacting and exerting pressure on theside of pummel 17a to move seat 17 in either direction. The turning ofseat 17 rotates standard 16 on ball. bearing assembly 15. Since motorcontrol support 21 is attached to standard 16, it moves along with thebody and feet of the dentist and is always in position for use, adjacentthe feet of the dentist. Foot support 10, being flat and surroundingstandard 16, is always available to support and rest the feet of thedentist.

When motor control support 21 is not necessary, it may be retracted outof the way, in the manner described above.

My dental stool thus provides complete flexibility of movement, since itmay be disposed close to or far away from the chair, adjusted as toheight, used with or without the motor control support and no matter howor Where the dentist moves, the foot support and motor controls arealways available.

I' claim:

1. A dental stool comprising a plurality of caster-carrying feet mountedbeneath and movably supporting said foot support, a standard extend inguprightly from the center of said foot support and rotatably mountedwith respect thereto, a seat adjustably mounted on the top of saidstandard, the rotation of said seat adapted to rotate said standard, aroller supported motor control support pivotally attached to saidstandard, said motor control support having a circular portion adaptedto hold a foot operated motor control, a pin attached to said motorcontrol support between said circular portion and said standard, a clampmounted on said standard, said motor control support adapted to bepivoted to a non-use position adjacent said standard, said clamp adaptedto grip said pin to hold said motor control support in non-use positionadjacent said standard, said motor control support adapted when in useto be rotated on the top of said foot support by the rotation of saidseat and standard.

2. The subject matter of claim 1, said seat having a pommel, said pommeladapted to be contacted by the a circular foot support,

thighs of the dentist to rotate said seat and motor control support ineither direction.

3. A dental stool comprising a support, a standard extending uprightlyfrom said support and rotatably mounted with respect thereto, a seatmounted on the top of said standard, the rotation of said seat adaptedto rotate said standard, a motor control support attached to saidstandard, said motor control support adapted to hold a foot operatedmotor control, said motor control support rotating as said standard isrotated to be constantly available adjacent the feet of the personseated on the stool.

4. The subject matter of claim 3, said seat having'a pommel, said pommeladapted to be contacted by the thighs of the dentist to rotate said seatand motor control support in either direction.

5. A dental stool comprising a substantially circular foot support, astandard extending uprightly from the center of said foot support androtatably mounted with respect thereto, a seat mounted on the top of.said standard, the rotation of said seat adapted to rotate saidstandard, a motor control support attached to said standard,

said motor control support adapted to hold. a foot operated motorcontrol, said motor control support rotating on said foot support assaid standard is rotated to be constantly available adjacent the feet ofthe person seated on the stool. 1

6. The subject matter of claim 5, said seat having a pommel, said pommeladapted to be contacted by the thighs of the dentist to rotate said seatand motor control support in either direction.

'7. The subject matter of claim 5, said motor control support being.pivotally attached by a horizontal pivot to said standard and beingretractable to aposition adjacent said standard when not in use.

References Cited in the file of this patent UNITED STATES PATENTS

